Can't use `each` statement on puppet 3.6

Issue

Unable to use the each statement in puppet. Documentation for each statement: https://docs.puppet.com/puppet/3.6/reference/function.html#each

[root@undercloud ~]# cat test.pp
$sgrouptmp = [ 'test', 'test2', 'test3' ]

each($sgrouptmp) |$sgroup| {
  notify { $sgroup : }
}

This throws the following error

Error: Could not parse for environment production: Could not match |$sgroup| at /root/test.pp:3 on node undercloud.default.redhat.local
Error: Could not parse for environment production: Could not match |$sgroup| at /root/test.pp:3 on node undercloud.default.redhat.local